BLALOCK ORCHARD DIST 10
PWS ID: WA5307350 · Walla Walla, Washington 99362
Population Served
250
Total Violations
58
Health-Based Violations
9
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 91
- County
- Walla Walla
- School/Daycare
- No
- MCL Violations
- 9
- Monitoring Violations
- 48
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 11 | 2009 |
| Coliform (TCR) | MCL | 9 | 2003 |
| Nitrate | MR | 8 | 2011 |
| Coliform (TCR) | MR | 3 | 1998 |
| Dalapon | MR | 1 | 2013 |
| Dinoseb | MR | 1 | 2013 |
| Consumer Confidence Rule | Other | 1 | 2024 |
| Ethylbenzene | MR | 1 | 2002 |
| Benzene | MR | 1 | 2002 |
| DICHLOROMETHANE | MR | 1 | 2002 |
| 1,1,1-Trichloroethane | MR | 1 | 2002 |
| 1,2,4-Trichlorobenzene | MR | 1 | 2002 |
| Trichloroethylene | MR | 1 | 2002 |
| cis-1,2-Dichloroethylene | MR | 1 | 2002 |
| CHLOROBENZENE | MR | 1 | 2002 |
| Tetrachloroethylene | MR | 1 | 2002 |
| 1,2-Dichloropropane | MR | 1 | 2002 |
| 2,4,5-TP | MR | 1 | 2013 |
| Toluene | MR | 1 | 2002 |
| Carbon tetrachloride | MR | 1 | 2002 |
| 1,2-Dichloroethane | MR | 1 | 2002 |
| Pentachlorophenol | MR | 1 | 2013 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1979 |
| Styrene | MR | 1 | 2002 |
| Picloram | MR | 1 | 2013 |
| 1,1-Dichloroethylene | MR | 1 | 2002 |
| 1,1,2-Trichloroethane | MR | 1 | 2002 |
| o-Dichlorobenzene | MR | 1 | 2002 |
| p-Dichlorobenzene | MR | 1 | 2002 |
| trans-1,2-Dichloroethylene | MR | 1 | 2002 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.